Posters
Changes in near point of convergence, amplitude of accommodation and positive fusional vergence after photorefractive keratectomy
Poster Details
First Author: R.Pérez SPAIN
Co Author(s): E. López-Artero A. González A. Matamoros Hordanza D. Medel I. López-Brea
Abstract Details
Purpose:
To investigate near point of convergence, amplitude of accommodation and positive fusional vergence response in near vision after photorefractive keratectomy in myopic patients.
Setting:
Miranza IOA, Madrid, Spain
Methods:
A total of 29 myopic patients with photorefractive keratectomy were enrolled in this prospective study. Patients with manifest tropia, accommodative or binocular dysfunctions, amblyopia, ocular pathology or any problem that may contraindicate refractive surgery were excluded. The preoperative exam included refraction, near point of convergence, amplitude of accommodation, positive fusional vergence and cover test distance and near vision. Postoperative assessment included uncorrected and best corrected visual acuities, residual refraction, amplitude of accommodation, positive fusional vergence, near point of convergence and a prism cover test 1 week, 1 month and 3 months after the surgery.
Results:
All patients had a follow-up clinical examination at 1 week, 1 month and 3 months after the surgery. The mean age of the patients was 28, 34 ± 5,14. The amplitude of accommodation and positive fusional vergence decreased a week after the surgery and gradually stabilized a month after the surgery. Three months after the surgery the amplitude of accommodation and positive fusional vergence got the same preoperative value. Near point of convergence (blur) improved at 1 week, 1 month and 3 months after the surgery P=0, P=0,00, P=0,001, respectively.
Conclusions:
There were differences in amplitude of accommodation, positive fusional vergence and near point of convergence after photorefractive keratectomy that might be relevant in some cases. Patients with binocular dysfunctions should be exhaustively examined prior refractive surgery.
Financial Disclosure:
None
